Electric lock.



v No. 738,824.

PATENTED SEPT. 15, 1903. w. MAUMILLAN. ELECTRIC LOCK.

APPLICATION I ILED JULY 29,1902.

3' SHEETS-SHEET 1;

H0 MODEL.

INVENTOR ATTORN Y8 v /////1/////dfd (1.,WASHINGYON u c PATENTED SEPT. 15

W. MAbMILLAN.

ELECTRIC LOCK. APPLIOATION FILED JULY 29, 1902.

3 SHEETS-SHEET 2.

N0 MODEL.

WITNESSES:

A INVENTOR m v /?m ATTOR EY 7 ELECTRIC LOOK.

APPLICATION FILED JULY 29, 1902 H0 MODEL. 3 8HEETSSHEET a.

WIIIIIII/IIII,

WITNESSES INVENTOR JQZ Q M BY ATTORN Y8 NITED STATES Patented September15, 1903.

WILLIAM MACMILLAN, OF NEW YORK, N. Y. ASSIGNOR OF ONE-HALF TO EGBERTWINKLER, OF YORK, N. Y.

ELECTRIC LOCK.

SPECIFICATION forming part of Letters Patent No. 738,824, datedSeptember 15, 1903. Application filed July 29, 1902. Serial No. 117,458.(No model.)

To all whom it may concern..-

Be it known that I, WILLIAM MACMILLAN, a subject of the King of GreatBritain, and a resident of the city, county, and State of New York, haveinvented certain new and useful Improvements in Electric Locks, of whichthe following is a specification.

Myinvention relates to locks which are controlled at a distance;and itsobject is to pro vide an electromagnet for controlling a retaining meansof the lock-bolt, and thereby prevent the opening of the lock untilafter the electromagnet has been operated.

The invention consists in features of construction and combination ofparts hereinafter described and claimed.

The invention is illustrated in the accompanying drawings, in whichFigure 1 illustrates the look as placed in the jamb of a door. Fig. 2illustrates a horizontal sectional view of the lock taken on the line 22 of Fig. 1. Fig. 3 illustrates another sectional view of the lock takenon the line 3 3 of Fig. 1. Fig. 4 illustrates a sectional view of thelook similar to the View illustrated in Fig. 3. As shown in Fig. 4, thelock is represented as being opened. Fig. 5 illustrates a rear view ofthe upper part of the lock, showing the cam-surface located on the gib.Fig. 6 illustrates a vertical sectional View of the lock taken on line 66 of Fig. 1. Fig. 7 illustrates the outside plate of the lock, showingthe supporting parts of the gib. Fig. 8 is a diagram illustrating thecircuit connections of the electric lock.

Referring to Fig. 1, 1 indicates the supporting-framework of the locklocated in the doorjamb 2. 3 indicates the door, and 4indicates the boltof the door-lock. The bolt 4 may be operated by either a knob or by akey, as in the ordinary lock. There may also be provided a retainingmeans in the form of a gib for maintaining the bolt 4 in a lockedposition. This retaining means or gib is electromagnectically controlledand will be swung out of its retaining position by the pressure.

of the bolt 4 upon the gib as the door is opened. The locking positionof the gib is maintained by a controlling means, which prevents themovement of the gib and consequently holds the door locked unless thecontrolling means is permitted to move by the action of anelectromagnet. In order that this function may be performed, thefollowing mechanism is provided.

In Figs. 2, 3, 4, 5, 6, and 7, 5 indicates the gib or the retainingmeans for the bolt 4. The gib is pivoted upon the rod 6 and is pressedinto a locking position by the operation of the spring 7. The normallimit of the motion of the gib is adjusted by means of a screw 9,supported in the ears or lugs 10 located on the gib. The gib has a hookor catch 11, which takes hold of the bolt 4. When the bolt is forcedagainst the catch 11, the gib 5 will be swung backward clear of the bolt4 unless the gib is maintained in its position by a retaining means inits locking position. In order to maintain the gib 5 in a lockingposition, I have provided a dog 12, which is pivoted on bearing-points13, located on the ends of the adjusting-screws 1415. In order to adjustthe position of the gib 12, the screws 14 and 15 are moved in and out ofthe frame of the lock. At the opposite end of the dog 12 there isprovided a ball-bearing 16, which is guided by a short strip 17, locatedon the top of the dog. This strip 17 has a hole 18, which is adapted toreceive the ball 16. The ball 16 is kept in the hole 18 by the pressureof the dog 12 against the gib 5. downward against the gib 5 by theoperation of the compression-spring 21, which is maintained in itsposition by the stud 20 and by the recess 19, located in the dog 12. Thedog 12 is moved to and fro by the operation of a cam-surface 22, whichis located on the gib 5. The cam-surface 22 is somewhat angular in itscontour, although for ease of operation of the gib all the parts of thesurface are curved. As the gib 5 is swung backward by the operation ofthe bolt 4 the cam-surface 22 operates upon the ball-bearing 18 to raisethe dog 12. If, however, the dog 12 is prevented by a retaining meansfrom this upward motion produced by the gib the gib will be held in alocking position, since the ball 16 is held below the shoulder 23 of thecam-surface 22, and if retained in this position the lock cannot beopened. For retaining the dog in a position to lock the gib there isprovided an arm 30, (shown in Figs. 3 and 6,) located on The dog 12 ispressed the dog and moved therewith. An armature or a catch 31, which iselectromagnetically controlled, is normally in the path of the end ofthe arm 30. The armature 31 or other electromagnetically-controlledmeans is supported on the pivot 32, supported by the frame 1, and isheld in its normal position by the operation of the spring 33. Foroperating the armature 31 there is provided a'magnet 34, supported bymeans of a yoke 35 upon the frame 1 of the look. This magnet 34 isconnected to a push-button 35 and to a battery 36. When the push-button35 is pressed, a circuit of the battery through the electromagnet isclosed and the electromagnet 34 is energized. The energization of themagnet 34 draws down the armature 31, so as to remove it from the pathof the arm located on the dog 12. When the catch or armature 31 is thusremoved, the dog 12 may be operated by the gib, which is moved by theoperation of the bolt 4 as the door is opened. When the door is opened,the bolt 4 presses against the hook or catch 11 of the gib 5 and forcesthe gib backward. This in turn moves the dog 12, the arm30 passing clearof the armature 31. In order that the door may be opened after a singleoperation of the pushbutton and the push-button allowed to return to itsnormal position, a catch is provided for holding the armature in theposition to which it is drawn by the magnet. This permits of the openingof the door upon a single pressure of the push-button 35 and alsopermits the removal of the hand as soon as the electromagnet 34 isenergized. The armature 31 is retained in its unlocking position by thecatch until the door is opened. The catch 40 is pivoted on the pin 41,Fig. 6, which is supported on a bracket 42, located on the frame 1. Theupper end of the catch 40 extends through and moves in a slot 43,located in the armature 31. This end is located directly under the arm30, located on the dog 12, so that when the arm passes clear of thearmatures it will move the catch, so as to allow the armature to springback to its normal position upon the return of the dog.

' The catch 40 is normally pressed forward by the operation of thespring 44, which presses against the catch 40 at one end and issupported on the bracket 42 at the other. When the door is opened andthe dog 12, with its arm 30, is moved, the arm 30 passes clear of thearmature 31 until it presses down the catch up against the arm 30. Whenthe bolt 4 has more swings into the path of the arm 30 and againprevents the movement of the dog 12 until the armature is again drawnout of its normal position by the operation of the magnet 34. In orderto prevent any loss of current due to holding the push-button down foran unnecessary length of time and greatly save the battery, the electriccircuit is broken upon the operation of the magnet. In order to thusbreak the circuit through the battery, apiece of insulating material45islocated on the upper end of the catch 40, where it comes in contactwith the armature 31, when the armature is drawn down by theelectromagnet 34, and the catch is so positioned as to hold the armatureat the point in which the insulation 45 is located. The circuitconnection to the battery is normally completed through the upper end ofcatch 40 and the armature 31, with which it is normallyin contact. Thearmature 31 is connected to the electromagnet 34, and the magnet 34 isconnected to the push-button 35, which is in turn connected to thebattery. When the magnet 34 draws the armature 31 down, theinsulatingpiece 45 breaks the circuit between the catch 40 and thearmature 31 and the magnet 34 is deenergized, although the push-button35 may be held down or may be pressed any number of times. The circuitis reestablished by the movement of the gib, which presses the catchdown and allows the armature to spring to its normal position.

The above description of myinvention and the illustrations shown in thedrawings is merely a preferable form of the invention. It may, however,be modified and varied in many ways by those skilled in the art withoutin any way departing from the spirit thereof. The lock may be used inconnection with time-locks. would then be closed by the operation of a atimepiece in a manner well known in the art. When the circuit is closedby a timepiece, a push-button, or bya switch connected to a mechanism ofany kind, the magnet is energized, and the safe door or lid of any kindmay be opened. The invention may be also used for unlocking themain-entrance doors in flats or in factories wherein a lock is to becontrolled from some distant point.

What I claim, and desire to secure by Letters Patent, is as follows:

1. In an electric lock, the combination of a gib, a dog moved by thesaid gib and for maintaining the said gib in a locking position, anarmature adapted to prevent the motion of the said dog, an electromagnetfor operating on the said armature, a catch adapted to retain thearmature in such a position so as to allow the movement of the said dog,and a means for tripping the said catch when the gib operates the saiddog as the door is opened.

2. In an electric lock, the combination of a gib having an angulargroove,a spring-pressed dog having a ballbearing movable on the saidgroove and adapted to retain the said gib in a locking position when thesaid bearing is The circuit in such a case' on one of the partsof thesaid angular surface, an arm carried by the said dog, an armaturenormally located relative to the said arm so as to prevent the movementof the said dog, an electromagnet for moving the said armature to allowthe said dog to be actuated.

3. In an electric lock for doors, &c., the combination of a gib,operated by the opening of the door or other similar device, a dogoperated by the said gib and for maintaining the said gib in a lockingposition, an armature for preventing the operation of the said dog, anelectromagnet for operating the said armature, a catch for retaining thesaid armature in a disconnected position until the said gib operates onthe said dog as the door or other similar device is opened.

4. In a lock for doors, 850., the combination of a gib operated by theopening of the door or other device, a dog actuated by the said gib andfor maintaining the said gib in a locking position, means for preventingthe actuation of the said dog and means for retaining the saidpreventing means in a disconnected position until after the said gib hasoperated on the said dog as the door or other device is opened.

5. In an electric lock for doors, the combination of a bolt, a gib forretaining the said bolt and Which is operated by the said bolt, a dogoperated by the said gib and for retaining the said gib in a lockingposition, an armature for preventing the operation of the said dog andmaintaining it in a locking position, an electromagnet for actuating thesaid armature to permit the operation of the said dog, a catch forretaining the said armature in a disconnected position, and a means forunlocking the said catch.

6. In an electric lock, the combination of a bolt, a-gib operated by thebolt as the lock is opened, a dog for locking said gib, an armature forretaining said dog in a locking position, a magnet for operating uponthe said armature, an electric circuit and a source of an electriccurrent for energizing the said magnet, a catch for retaining saidarmature in an unlocking position and for breaking electric circuituntil the said gib operates on the said dog as the door is opened.

7. In an electric lock, the combination of a gib having a slot, aspring-pressed dog having the ball-bearings movable in the said slot, anarmature for preventing operation of the said dog, an electromagnet foroperating upon the said armature, an electric circuit andasource ofelectric current for energizing the said magnet, a catch having aninsulating-piece for retaining said armature in an unlocking positionand for breaking the electric circuit through the said electromagnetuntil the said dog is'operated by the said gib.

WILLIAM MACMILLAN.

Witnesses:

JOHN O. GEMPLER, SIDNEY MANN.

